This Week in AI · Reviewed
How Fyxer built an AI executive assistant people trust
What shipped from OpenAI, Anthropic, Google, and Microsoft, and one thing to do with it.
1. How Fyxer built an AI executive assistant people trust
Fyxer uses OpenAI models, fine-tuning, memory, and real user feedback to organize inboxes and draft emails in each user’s voice. Source
Read the source, then apply it to one task you already own this week.
2. Perplexity trusts GPT-6 Astra with end-to-end systems
Perplexity uses Astra to write communications, change software, and monitor production systems, and checks in much less frequently than with earlier models. Source
Read the source, then apply it to one task you already own this week.
3. Rapidly scaling online storage to serve over 1 billion ChatGPT users
Learn how OpenAI evolved Habitat from a Python library into a globally distributed storage platform serving 1 billion ChatGPT users and 22M requests per second. Source
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4. Cognition helps Devin test its own work with GPT‑6 Astra
GPT‑6 Astra improves Devin’s ability to test software and show that it works, with the goal of helping engineers review less code and ship more. Source
Read the source, then apply it to one task you already own this week.